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                        Python语法之装饰器
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                        闭包
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                        装饰器
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                            <b>4.</b>
                        
                        MySQL数据库基本操作
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                        数据库概述
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                        数据完整性
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                        图形化客户端Navicat
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                        命令行客户端SQL的使用
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                        登录和退出数据库
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                        表结构的操作
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                        数据库的操作
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                        表数据的操作
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                            <b>4.5.</b>
                        
                        知识总结
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                        MYSQL数据库进阶操作
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                        练习强化
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                            <b>5.2.</b>
                        
                        条件
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                        排序
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                            <b>5.4.</b>
                        
                        分页
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                            <b>5.5.</b>
                        
                        聚合函数
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                            <b>5.6.</b>
                        
                        分组
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                        连接
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                            <b>5.8.</b>
                        
                        自连接
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                        子查询
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                        MYSQL数据库编程
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                        数据准备
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                        SQL演练
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                        数据库设计
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                        数据库编程
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                        MySQL数据库高级用法
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                        视图
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                        事务
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                        索引
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                        主从配置
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                        总结
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                        miniweb框架
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                        框架概念
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                        实现一个简单的框架
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                        模板替换
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                        路由概念
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                            <b>8.5.</b>
                        
                        股票收藏夹
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                            <b>8.6.</b>
                        
                        复习
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<p>&#x6570;&#x636E;&#x5E93;&#x64CD;&#x4F5C;&#x7684;&#x57FA;&#x672C;&#x6B65;&#x9AA4;:</p>
<ol>
<li>&#x8FDE;&#x63A5;&#x6570;&#x636E;&#x5E93; &#x8F93;&#x5165;&#x7528;&#x6237;&#x540D;&#x548C;&#x5BC6;&#x7801;.</li>
<li>&#x5BF9;&#x6570;&#x636E;&#x5E93;&#x3001;&#x8868;&#x7ED3;&#x6784;&#x3001;&#x8868;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x64CD;&#x4F5C;.</li>
<li>&#x9000;&#x51FA;&#x6570;&#x636E;&#x5E93;.</li>
</ol>
<h5 id="1-&#x6570;&#x636E;&#x5E93;&#x767B;&#x5F55;">1. &#x6570;&#x636E;&#x5E93;&#x767B;&#x5F55;</h5>
<pre><code class="lang-python"><span class="hljs-comment"># &#x8F93;&#x5165;&#x4EE5;&#x4E0B;&#x547D;&#x4EE4;</span>
<span class="hljs-comment"># -u &#x540E;&#x9762;&#x662F;&#x767B;&#x5F55;&#x7684;&#x7528;&#x6237;&#x540D;</span>
<span class="hljs-comment"># -p &#x540E;&#x9762;&#x662F;&#x767B;&#x5F55;&#x5BC6;&#x7801;, &#x5982;&#x679C;&#x4E0D;&#x586B;&#x5199;, &#x56DE;&#x8F66;&#x4E4B;&#x540E;&#x4F1A;&#x63D0;&#x793A;&#x8F93;&#x5165;&#x5BC6;&#x7801;</span>
mysql -uroot -p
</code></pre>
<center><img src="../assets/day14/2-3-4.png"></center>
<center><b>MySQL &#x767B;&#x5F55;</b></center>



<h5 id="2-&#x9000;&#x51FA;&#x6570;&#x636E;&#x5E93;">2. &#x9000;&#x51FA;&#x6570;&#x636E;&#x5E93;</h5>
<pre><code>quit &#x548C; exit
&#x6216;
ctrl + d
</code></pre><p>&#x4E09;&#x79CD;&#x9000;&#x51FA;&#x65B9;&#x5F0F;&#x4F7F;&#x7528;&#x54EA;&#x79CD;&#x90FD;&#x53EF;&#x4EE5;. &#x4E3A;&#x4E86;&#x5B89;&#x5168; &#x5EFA;&#x8BAE;&#x5728;<strong>&#x767B;&#x5F55;</strong>&#x7684;&#x65F6;&#x5019;&#x4F7F;&#x7528;&#x4E0D;&#x56DE;&#x663E;&#x7684;&#x65B9;&#x5F0F;&#x8F93;&#x5165;.</p>
<p>&#x767B;&#x5F55;&#x6210;&#x529F;&#x540E;, &#x8F93;&#x5165;&#x5982;&#x4E0B;&#x547D;&#x4EE4;&#x67E5;&#x770B;&#x6548;&#x679C;&#xFF1A;</p>
<pre><code class="lang-python"><span class="hljs-comment"># &#x67E5;&#x770B;&#x7248;&#x672C;</span>
select version();
<span class="hljs-comment"># &#x663E;&#x793A;&#x5F53;&#x524D;&#x65F6;&#x95F4;</span>
select now();
</code></pre>
<h2 id="42-&#x6570;&#x636E;&#x5E93;&#x64CD;&#x4F5C;">4.2 &#x6570;&#x636E;&#x5E93;&#x64CD;&#x4F5C;</h2>
<p><strong>1. &#x67E5;&#x770B;&#x6240;&#x6709;&#x6570;&#x636E;&#x5E93;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">show</span> <span class="hljs-keyword">databases</span>;</span>
</code></pre>
<p><strong>2. &#x67E5;&#x770B;&#x5F53;&#x524D;&#x4F7F;&#x7528;&#x7684;&#x6570;&#x636E;&#x5E93;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">select</span> <span class="hljs-keyword">database</span>();</span>
</code></pre>
<p><strong>3. &#x4F7F;&#x7528;&#x6570;&#x636E;&#x5E93;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">use</span> &#x6570;&#x636E;&#x5E93;&#x540D;;</span>
</code></pre>
<p><strong>4. &#x521B;&#x5EFA;&#x6570;&#x636E;&#x5E93;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">create</span> <span class="hljs-keyword">database</span> &#x6570;&#x636E;&#x5E93;&#x540D; <span class="hljs-keyword">charset</span>=utf8;</span>
</code></pre>
<p><strong>5. &#x5220;&#x9664;&#x6570;&#x636E;&#x5E93;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">drop</span> <span class="hljs-keyword">database</span> &#x6570;&#x636E;&#x5E93;&#x540D;;</span>
</code></pre>
<h2 id="43-&#x6570;&#x636E;&#x5E93;&#x64CD;&#x4F5C;">4.3 &#x6570;&#x636E;&#x5E93;&#x64CD;&#x4F5C;</h2>
<p><strong>1. &#x67E5;&#x770B;&#x5F53;&#x524D;&#x6570;&#x636E;&#x5E93;&#x4E2D;&#x6240;&#x6709;&#x8868;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">show</span> <span class="hljs-keyword">tables</span>;</span>
</code></pre>
<p><strong>2. &#x67E5;&#x770B;&#x8868;&#x7ED3;&#x6784;</strong></p>
<pre><code class="lang-sql">desc &#x8868;&#x540D;;
</code></pre>
<p><strong>3. &#x521B;&#x5EFA;&#x8868;&#x7ED3;&#x6784;&#x7684;&#x8BED;&#x6CD5;.</strong></p>
<p>&#x63D0;&#x793A;  auto_increment&#x8868;&#x793A;&#x81EA;&#x52A8;&#x589E;&#x957F;.</p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">CREATE</span> <span class="hljs-keyword">TABLE</span> table_name(
    &#x5B57;&#x6BB5;&#x540D;&#x79F0; &#x6570;&#x636E;&#x7C7B;&#x578B;  &#x53EF;&#x9009;&#x7684;&#x7EA6;&#x675F;&#x6761;&#x4EF6;,
    column1 datatype contrai,
    column2 datatype,
    column3 datatype,
    .....
    columnN datatype,
    <span class="hljs-comment">-- &#x4E3B;&#x952E;&#x8BF4;&#x660E;&#x53EF;&#x4EE5;&#x653E;&#x5728;&#x5B57;&#x6BB5;&#x4E2D;&#x5355;&#x72EC;&#x8BF4;&#x660E; &#x4E5F;&#x53EF;&#x4EE5;&#x653E;&#x5728;&#x6700;&#x540E;&#x7EDF;&#x4E00;&#x8BF4;&#x660E;</span>
    PRIMARY <span class="hljs-keyword">KEY</span>(one <span class="hljs-keyword">or</span> more <span class="hljs-keyword">columns</span>)
);</span>
</code></pre>
<p>&#x4F8B;&#xFF1A;&#x521B;&#x5EFA;&#x73ED;&#x7EA7;&#x8868;</p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">create</span> <span class="hljs-keyword">table</span> classes(
    <span class="hljs-keyword">id</span> <span class="hljs-built_in">int</span> <span class="hljs-keyword">unsigned</span> auto_increment primary <span class="hljs-keyword">key</span> <span class="hljs-keyword">not</span> <span class="hljs-literal">null</span>,
    <span class="hljs-keyword">name</span> <span class="hljs-built_in">varchar</span>(<span class="hljs-number">10</span>)
);</span>
</code></pre>
<p>&#x4F8B;&#xFF1A;&#x521B;&#x5EFA;&#x5B66;&#x751F;&#x8868;</p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">create</span> <span class="hljs-keyword">table</span> students(
    <span class="hljs-keyword">id</span> <span class="hljs-built_in">int</span> <span class="hljs-keyword">unsigned</span> primary <span class="hljs-keyword">key</span> auto_increment <span class="hljs-keyword">not</span> <span class="hljs-literal">null</span>,
    <span class="hljs-keyword">name</span> <span class="hljs-built_in">varchar</span>(<span class="hljs-number">20</span>) <span class="hljs-keyword">default</span> <span class="hljs-string">&apos;&apos;</span>,
    age tinyint <span class="hljs-keyword">unsigned</span> <span class="hljs-keyword">default</span> <span class="hljs-number">0</span>,
    height <span class="hljs-built_in">decimal</span>(<span class="hljs-number">5</span>,<span class="hljs-number">2</span>),
    gender enum(<span class="hljs-string">&apos;&#x7537;&apos;</span>,<span class="hljs-string">&apos;&#x5973;&apos;</span>,<span class="hljs-string">&apos;&#x4EBA;&#x5996;&apos;</span>,<span class="hljs-string">&apos;&#x4FDD;&#x5BC6;&apos;</span>),
    cls_id <span class="hljs-built_in">int</span> <span class="hljs-keyword">unsigned</span> <span class="hljs-keyword">default</span> <span class="hljs-number">0</span>
)
</span></code></pre>
<p><strong>4. &#x4FEE;&#x6539;&#x8868;-&#x6DFB;&#x52A0;&#x5B57;&#x6BB5;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> &#x8868;&#x540D; <span class="hljs-keyword">add</span> &#x5217;&#x540D; &#x7C7B;&#x578B;;</span>

&#x4F8B;&#xFF1A;
<span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> students <span class="hljs-keyword">add</span> birthday datetime;</span>
</code></pre>
<blockquote>
<p>&#x4EC0;&#x4E48;&#x65F6;&#x5019;&#x9700;&#x8981;&#x7ED9;&#x8868;&#x65B0;&#x589E;&#x5B57;&#x6BB5;
&#x8868;&#x5DF2;&#x7ECF;&#x521B;&#x5EFA;&#x597D; &#x4F46;&#x662F;&#x8868;&#x4E2D;&#x6CA1;&#x6709;&#x9700;&#x8981;&#x7684;&#x5B57;&#x6BB5;&#x65F6;</p>
</blockquote>
<p><strong>5. &#x4FEE;&#x6539;&#x8868;-&#x4FEE;&#x6539;&#x5B57;&#x6BB5;-&#x91CD;&#x547D;&#x540D;&#x7248;</strong></p>
<p>&#x5728;&#x8868;&#x4E2D;&#x5DF2;&#x6709;&#x5B57;&#x6BB5; &#x4F46;&#x662F;&#x5B57;&#x6BB5;&#x540D;&#x4E0D;&#x6EE1;&#x8DB3;&#x8981;&#x6C42; &#x7C7B;&#x578B;&#x6216;&#x7EA6;&#x675F;&#x6EE1;&#x8DB3;&#x6216;&#x8005;&#x4E0D;&#x6EE1;&#x8DB3;&#x5747;&#x53EF;&#x3002;</p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> &#x8868;&#x540D; <span class="hljs-keyword">change</span> &#x539F;&#x540D; &#x65B0;&#x540D; &#x7C7B;&#x578B;&#x53CA;&#x7EA6;&#x675F;;</span>
&#x4F8B;&#xFF1A;
<span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> students <span class="hljs-keyword">change</span> birthday birth datetime <span class="hljs-keyword">not</span> <span class="hljs-literal">null</span>;</span>
</code></pre>
<p><strong>6. &#x4FEE;&#x6539;&#x8868;-&#x4FEE;&#x6539;&#x5B57;&#x6BB5;&#x4E0D;&#x91CD;&#x547D;&#x540D;&#x7248;</strong></p>
<p>&#x5728;&#x8868;&#x4E2D;&#x5DF2;&#x6709;&#x5B57;&#x6BB5; &#x5E76;&#x4E14;&#x5B57;&#x6BB5;&#x540D;&#x4E5F;&#x6EE1;&#x8DB3;&#x8981;&#x6C42; &#x4F46;&#x662F;&#x7C7B;&#x578B;&#x6216;&#x7EA6;&#x675F;&#x4E0D;&#x6EE1;&#x8DB3;&#x8981;&#x6C42;</p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> &#x8868;&#x540D; <span class="hljs-keyword">modify</span> &#x5217;&#x540D; &#x7C7B;&#x578B;&#x53CA;&#x7EA6;&#x675F;;</span>
&#x4F8B;&#xFF1A;
<span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> students <span class="hljs-keyword">modify</span> birth <span class="hljs-built_in">date</span> <span class="hljs-keyword">not</span> <span class="hljs-literal">null</span>;</span>
</code></pre>
<p><strong>7. &#x4FEE;&#x6539;&#x8868;-&#x5220;&#x9664;&#x5B57;&#x6BB5;</strong></p>
<p>&#x5F53;&#x8868;&#x4E2D;&#x591A;&#x51FA;&#x4E00;&#x4E2A;&#x5B57;&#x6BB5; &#x5DF2;&#x7ECF;&#x4E0D;&#x518D;&#x9700;&#x8981;&#x7684;&#x65F6;&#x5019;</p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> &#x8868;&#x540D; <span class="hljs-keyword">drop</span> &#x5217;&#x540D;;</span>
&#x4F8B;&#xFF1A;
<span class="hljs-operator"><span class="hljs-keyword">alter</span> <span class="hljs-keyword">table</span> students <span class="hljs-keyword">drop</span> birthday;</span>
</code></pre>
<p><strong>8. &#x5220;&#x9664;&#x8868;-&#x614E;&#x91CD;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">drop</span> <span class="hljs-keyword">table</span> &#x8868;&#x540D;;</span>
&#x4F8B;&#xFF1A;
<span class="hljs-operator"><span class="hljs-keyword">drop</span> <span class="hljs-keyword">table</span> students;</span>
</code></pre>
<p><strong>9. &#x67E5;&#x770B;&#x8868;&#x7684;&#x521B;&#x5EFA;&#x8BED;&#x53E5;-&#x8BE6;&#x7EC6;&#x8FC7;&#x7A0B;</strong></p>
<pre><code class="lang-sql"><span class="hljs-operator"><span class="hljs-keyword">show</span> <span class="hljs-keyword">create</span> <span class="hljs-keyword">table</span> &#x8868;&#x540D;;</span>
&#x4F8B;&#xFF1A;
<span class="hljs-operator"><span class="hljs-keyword">show</span> <span class="hljs-keyword">create</span> <span class="hljs-keyword">table</span> classes;</span>
</code></pre>
<h2 id="42-&#x5C0F;&#x7ED3;">4.2 &#x5C0F;&#x7ED3;</h2>
<ol>
<li>&#x4F7F;&#x7528; <strong>mysql -uroot -p</strong> &#x547D;&#x4EE4;&#x767B;&#x5F55;&#x6570;&#x636E;&#x5E93;.</li>
<li>&#x4F7F;&#x7528; <strong>exit</strong>&#x3001;<strong>quit</strong> &#x547D;&#x4EE4;&#x6216;&#x8005; <strong>ctrl + d</strong> &#x5FEB;&#x6377;&#x952E;&#x9000;&#x51FA;&#x6570;&#x636E;&#x5E93;&#x767B;&#x5F55;.</li>
<li>&#x4F7F;&#x7528; <strong>show databases</strong> &#x547D;&#x4EE4;&#x67E5;&#x770B;&#x6240;&#x6709;&#x7684;&#x6570;&#x636E;&#x5E93;.</li>
<li>&#x4F7F;&#x7528; <strong>select database()</strong> &#x547D;&#x4EE4;&#x67E5;&#x770B;&#x5F53;&#x524D;&#x4F7F;&#x7528;&#x7684;&#x6570;&#x636E;&#x5E93;.</li>
<li>&#x4F7F;&#x7528; <strong>use &#x6570;&#x636E;&#x5E93;&#x540D;</strong> &#x547D;&#x4EE4;&#x9009;&#x62E9;&#x4F7F;&#x7528;&#x6570;&#x636E;&#x5E93;.</li>
<li>&#x4F7F;&#x7528; <strong>create database &#x6570;&#x636E;&#x5E93;&#x540D; charset=utf8;</strong> &#x547D;&#x4EE4;&#x521B;&#x5EFA;&#x6570;&#x636E;&#x5E93;&#x3002;</li>
<li>&#x4F7F;&#x7528; <strong>drop database &#x6570;&#x636E;&#x5E93;&#x540D;;</strong> &#x547D;&#x4EE4;&#x5220;&#x9664;&#x6570;&#x636E;&#x5E93;.</li>
</ol>

                    
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